Forest Fire (File Photo)

Fire crews have extinguished most of what is now a great alarm fire in Boyle Heights today but are still unable to access parts of the burning structure. Firefighters were called at 11:39 p.m. Monday to a one-story commercial structure at 1601 E. First St. and have been unable to gain access to various pockets of fire due to the structural integrity of the building, which has cracks and separation in more than one wall, said Los Angeles Fire Department spokeswoman Margaret Stewart. Per LAFD protocol, the department’s Arson Section is responding to investigate the cause of the fire, Stewart said. No injuries have been reported and there is no further information.